Turret attachment for metal-working machines



F. P. LOVEJOY. TURRET ATTACHMENT FOR METAL WORKING MACHINES.

APPLICATION FILED NOV. 6. I919.

Patented Dec. 20, 1921.

2 SHEETS-SHEET I.

F. P. LOVEJOY.

T UB'RET ATTACHMENT FOR METAL WORKING MACHINES.

APPLICATION FILED NOV'. 5| I919.

Patented Dec. 20,- 1921.

UNITED STATES PATENT OFFIQE.

FRED 1P. LOVEJOY, OF SPRINGFIELD, VERMONT.

TURRET ATTACHMENT FOR METAL-WORKING MACHINES.

Application filed November 6, 1919, Serial No. 336,070.

To all whom itmay concern Be it known that I, F nno P. LovEJoY, acitizen of the United States, residing at Springfield, in the county oflVindsor and State of Vermont, have invented new and useful Improvementsin Turret Attachments for Metal-VVorking Machines, of which thefollowing is a specification.

This invention has for its object to provide a fixture or attachment,for use on metal-working machines, such as engine lathes, planers,shapers, boring mills and the like, by which the cutters may be easilyand accurately located in operative position and rigidly held againstthe cutting strains.

The attachment comprises a cutter-holding turret, and a tool posttherefor, together with means for indexing the turret and locking it tothe post. The indexing means includes a handle or binding lever, whichcarries a member for moving a turret bolt into inactive position, whenthe handle is shifted, and also a member for moving the turret when thelatter is unlocked.

On the accompanying drawings, which illustrate one embodiment of theinvention,

Figure 1 represents in section the attachment as being mounted upon thetool slide of an engine lathe and the tool slide being indicated indotted lines.

Fig. 2 represents a section on the line 22 of Fig. 1 and illustrates theturret-locking bolt and the means for moving it to unlocked position.

Fig. 3 represents a section on the line 33 of Fig. 1 and shows thespi'ingope-rated plunger for engaging and indexing the turret.

F 4 shows in section a "fragment of the upper portion of the turret ringand illustrates one of the notches formed therein for cooperation withthe plunger last referred to.

Fig. 5 represents a plan view 01" the bind ing lever or handle in itsoperative position upon the tool post.

Fig. 6 illustrates a clamping member for use in clamping the tool postto the tool slide. I

Fig. 7 illustrates one of the interchangeable turrets.

Fig. 8represents a section on the line 88 of Fig. 7 v

Fig. 9 represents a section on the line 9-9 of Fig. 7 and shows thecutter as being engaged with the work.

. Fig. 10 illustrates one of the cutter holders detached.

As previously indicated, the attachment or fixture, which will now bedescribed in the tail, may be used in various forms of metalworkingmachines. It is the purpose to provide the attachment with a pluralityof interchangeable turrets or turret rings having tools of variouskinds. For example, each turret ring may have a. series of tools forinternal work while other turret rings may be provided with sets ofturning or facing tools ofditferent shapes for outside work, so that,after the tools of one turret have performed their functions upon thework, the turret may be replaced by another having another set of toolsfor performing otheroperations on the work. The fixture or attachment isso constructed that the turrets or turret rings may be very quicklyremoved. and replaced by others. V

The fixture as a whole comprises a center post having a base 15 and acentral upstanding cylindrical member 16, the upper end of which isreduced and threaded as at 17. The base of the post may be constructedto fit upon the tool slide of an engine lathe such as indicated indotted lines at 18. For securing it in' place, the post is hollow asshown and a bolt 19 is projected therethrough into threaded engagementwith a clamping block 20 located in an undercut groove in the carriageor slide 18. The base of the post may be provided with transverse ribs21 to fit complemental grooves in the upper face of the tool slide. Uponthe non-threaded or cylindrical portion of the post is placed a turret22 which is substantially ringlike as shown in Fig. 7. It has a closefit upon the post but is capable of rotating thereon. The under face ofthe turret has an annular rib 23 which rests upon the upper face of thebase 15 of the post. A clamping lever, comprising a hub 24 and a handle25, is utilized to bind the turret against the base of the post. To thisend, the hub 24 is internally threaded so as to be screwed upon thethreaded end of the post, and its under faceis provided with an annularflange or rib 26 to engage the upper portion of the turret. I do notrely, however, solely upon the binding action of the hub for holding theturret against dislocation. On the contrary, I provide the fixture witha locking bolt by which the turret may be accurately and positivelylocked against rotativ'e movement. This bolt is indicatedat 27 and itconsists of a bar located in a vertical groove formed in the side of thepost 16. At its lower end, this baris provided with a lateral extension28 which is adapted to lie within any one ofa series of four radialsockets 29, 29, formed in the under face of the turret. The lower end ofthe bolt, including the extension 28, extends into a groove 30 formed inthe base 15 of the post so that the bolt may be depressed into aposition below the horizontal plane of the lower face of the turret soas to be free from engagement with the turret and thus permit the'latterto be rotated. The bolt, however, is normally forced upwardly intolocking position by a compression spring 31 located in a recess formedin the bolt, as shown in Fig. 2, one end being engaged with the bolt andthe other end with a pin 32 secured to the post. By an examination ofFig. 2, it-

will be noted that the operative locking portion of the bolt iswedged-shaped and that the sockets 29 in the turret are complementallyformed so that the bolt will accurately locate the turret when it is ininterlocked relationship therewith.

It is necessary to provide some means for unlocking the turret before itis indexed, and for this purpose the hub 24 is provided with a pivot-edmember indicated at 33 which is hung upon a pin 34. The hub is recessedto receive the member 33, as indicated in Figs.

1 and 2. The member 33 is provided with a fiat end a adapted to engage afiat face I) on the upper end of thebolt, and also with a face 0 forengaging the upper end of the recess in the hub. Assuming'that the partsare in the position shown in 2, it will be seen that, if the hub bemoved in an anticlockwise direction, the pivoted member 33 will rideover the upper end of the bolt and force it downwardly far enough sothat the locking lug or projection 28 will be depressed from engagementwith the socket 29; and also that, if the hub be rotated in a clockwisedirection, the member 33 will be-lifted as it passes over the projectingupper end of the lock without depressing the latter. It is evident fromthis description that, if the binding lever, including the hub 24 andthe handle 25, be rotated in a clockwise direction so as to screw thehub downwardly on the threaded end of the post, the hub will eventuallytightly clamp and bind the turret against the face of the tool of thepost base. WVhen, however, the handle is rotated in a directionanti-clockwise, the first movement of the handle will tend to unclampthe turret, and that, when the member 33 engages the bolt, the latterwill be depressed so as to unlock the turret and permit its rotation.

The binding lever is provided also with means for effecting theindexing'ot the turret. In the illustrated embodiment of the invention,this consists of a plunger 35 which is located in a cylindrical socket36 formed in the under side of the hub 24. A spring 37, placed in saidsocket, exerts a constantly downward pressure upon the plunger. Thelower end of the plunger is oppositely beveled, as shown in Fig. 3, andit is adapted to engage any one of a series of four radial V-shapedgrooves or recesses '38 formed in the end of the turret. These groovesare so located that the plunger will not enter any one of them untilafter the hub has been rotated a sufficient distance to effect theunlocking of the turret by the means hereinbefore described, the lowerend of the plunger in the meantime riding on the upper face of theturret. The plunger is provided with a stem 39 which extends upwardlythrough the hub and is provided on its upper end with a knob 40 securedthereto by a pin '41. For the purpose of holding the plunger againstrotation under normal conditions, the knob 40 has .a depending pin 42extending into a socket or recess 43 formed in the upper part of the hub24. If

desired, the plunger may be drawn upwardly against the pressure of thespring 37 far enough to lift the pin 42 from the recess 43, and the knob40 is rotated slightly so that the pin 42 will rest upon the upper faceof the hub and thus hold the plunger in inactive position.

In operation, when the clamping lever has been moved in ananti-clockwise direction suiiiciently to unclamp the turret and move thebolt in to an inactive position, the alunger 35 enters one of the radialgrooves 38, and thereafter the continued movement of the handle 25effects the rotation of the tool. Thus the turret may be advanced orrotated one step to bring another tool into operative position. At thispoint the bolt again moves into locking position and holds the turretagainst further movement. Thereupon the handle 25 may be moved in aclockwise direction so as to bind the turret firmly against the face ofthe base 15.

On sheet 2 of the drawings, I have illustrated a turret provided withtools such as may be employed for performing certain operations upon thework. The turret is shown as having a series of sockets in the sidesthereof, said sockets being indicated at 44. Such sockets may be radialof the axis of the turret or may be tangential to an the recesses 48 Iprovide two cylindrical clamping members 49, 50, which may be drawntogether by a bolt 51, the head 52 of which engages the clamp 50 and thethreaded end of which is screwed into the clamp 49. A compression spring53 may be placed between the two clamps with its ends arranged insockets therein for the purpose of forcing the clamps apart when thebolt 52 is unscrewed. The two clamps are provlded with concave "faces 6and f for engaging the cylindrical shank a7. From this description, itwill be apparent that, when the shank has been inserted in the socket4:4: and loosely into engagement with the clamps 49 and 50, the bolt 52may be rotated so as to draw the clamps together, and, by their combinedwedging action on the shank 4L7, bind it firmly in its socket againstdanger of rotation. On loosening the clamping mechanism, each toolholder may be r0tatively adjusted and then secured after suchadjustment.

I have not deemed it necessary to show more than one turret wit-h theproper equipment of tools, for those skilled in the art will readilyunderstand that other turrets having other forms of tools for turning,

threading or facing the work, may be readily provided to replace theturret whlch I have shown.

Having thus explained the nature of my said invention and described away of making and using the same, although without attempting to setforth all of the forms in which it may be made or all of the modes ofits use, what I claim is: v

1. An attachment for a metal-working machine, comprising a verticalnon-rotary post provided with a base and having .a reduced upperexternally-threaded portion and an enlarged non-threaded lower portion,a tool-carrying turret journaled directly on the unthreaded portion, alever in threaded engagement with said post and overlapping the turretand adapted to swing about the axis of said post to clamp said turretagainst said base, means on said lever for indexing. the turret, andmeans controlled by said lever as it moves about said axis forpositively locking and unlocking said turret.

2. An attachment for a metal-working machine, comprising a post, atool-carrying turret thereon and having. spaced grooves or recesses onthe upper end, a lever mounted on said post and adapted to swing aboutthe axis thereof, means controlled by said lever for locking andunlocking said turret, and a springst'ressed plunger carried by saidlever for engaging said grooves and indexing the turret when said leveris moved in the proper direction.

3. An attachment for a metal-working machine, comprising a tool-carryingturret, a post provided with a base and having a non-threaded portion onwhich said turret is journaled, and having an external threaded endportion, a clamp lever in threaded engagement with the end portion ofsaid post for clamping the turret against said base, and means mountedon and movable with said lever for engaging and indexing the turret.

4. An attachment for a metal-working machine, comprising a tool-carryingturret, a post provided with a base and having a non-threaded portion onwhich said turret is j ournaled, and having a threaded end portion, aclamp lever in threaded engagement with said post for clamping theturret against said base, a lock for locking said turret to said postand base, and means mounted on said lever for engaging and moving saidlock to inactive position when the lever is rotated to unclamp saidturret.

5. An attachment for a .metal-working machine, comprising atool-carrying turret, a stationary post provided with a base and havinga non-threaded portion on which said turret is journaled, and having athreaded end portion, a clamp lever in threaded engagement with saidpost for clamping the turret against said base, means mounted on andmovablewith said lever for engaging the upper end of and indexing theturret, a lock extending through said turret for locking said turret tosaid base, and means mounted on and-movable with said lever fordisengaging the look from said turret.

6. An attachment for metal-working machines, comprising a post having abase, an unthreaded portion and a threaded end portion, a turretjournaled on the unthreaded portion of said post and resting on saidbase, said turret having spaced recesses in its upper end, a clamp leverscrewed on the threaded portion of said post for clamping said turretagainst said base, a handle on said clamp member for rotating it, and aspring-pressed plunger on said member for engaging said recesses andindexing the turret when the handle is operated to release said clampmember.

7. An attachment for metal-working machines, comprising a non-rotaryposthaving a base, a turret journaled on said post and resting on said base,a clamp lever threaded on said post for clamping said turret againstsaid base, a handle on said clamp member for rotating it, aspringstressed locklng member slldably mounted in said post forautomatically locklng said turret to said post, and a movable member.

the unthreaded portion of said post and rest ing on said base, a clampmember threaded on the end portion of said post for clamping said turretagainst said base, a handle on said clamp member for rotating it, alocking member seated in the post for locking said turret to said post,and a pivoted wedge member on said clamp member for moving said lockingmember to unlocked position whensaid clamp member is rotated to releasesaid turret.

9. An attachment for a metal-working machine, comprising a tool-carryingturret having a series of recesses, a post on which said turret is-journaled and having a base, a lever hinged on said post, a lockingmember arranged to slide in said post and engage any one of said seriesof recesses, and means carried by said lever for moving said lockingmember to inactive position.

10. An attachment for a metal-working machine, comprising atool-carrying turret having a series of recesses, a post on which saidturret is journaled and having a base, a lever hinged on said post, alocking member arranged to slide in said post and en a e an one of saidseries of recesses and a member pivoted to said lever and arranged toengage and move said locking member to inactive position when the leveris movedin one direction, and to ride'over the said locking memberwhenthe lever is moved in the opposite direction.

11. An attachment for a metal-working machine, comprising atool-carrying turret having a series of recesses, a post on which saidturret is journaled and having a base, a lever hinged on said post, alocking member arranged to slide in said post and having a lug extendinginto said base and adapted to enter one of said recesses to lock theturret to said base, and means on said lever for moving said lockingmember to inactive position to release said turret.

12. The combination with a support, of a cutter post having abaseadapted to rest on said support, means for removably clamping said poston said support, a handle lever having a hub in threaded engagement withthe post, a tool-carrying turret journaled on said post between said huband said base, and adapted to be clamped against said base bysaid'support, means 011 said. hub. for indexing the turret, a 1101'-mally active turret lock, and means on said hub, operable'by themovement of'said hub in releasing the turret, to move the lock toinactive position.

, 13. An attachment for metal-working machines, comprising a center posthaving a base adapted to be secured to a suitable support, a ringliketool-carrying turret journaled on said post, a handle lever hung on saidpost to rotate thereon, said turret having a series of recesses and saidlever having a spring-pressed plunger for engaging said recesses andindexing the turret, a turret lock seated in a groove in said post andarranged to engage recesses in the turret to lock it against rotation,and means on said lever arranged to move said lock to inactive position.1

14:. An attachment for metal-working machines, comprising a center posthaving a base adapted to be secured to a suitable support, a ringliketool-carrying turret journaled on said post, a handle lever hung on saidpost to rotate thereon, said turret having a series of recesses and saidlever having means for engaging said recesses and indexing the turretwhen said lever is rotated, a spring-stressed turret lock seated in agroove in the post and normally engaging said turret, and a pivotedwedge on said.

lever for moving said lock to inactive position when the lever is movedin one direction, and to pass freely over said look when the lever ismoved in the opposite direction.

15. An attachment for metal-working machines, comprising a verticalnon-rotary center post having an integral base adapted to be securedupon a suitable support and also having its upper end externallythreaded, and a clamp adapted for threaded engagement with said post,and having means for indexing the hereinafter-mentioned turret, of aringlike turret removably journaled on said post, seated on said base soas to be clamped thereagainst by said clamp and having a set of cutterssecured thereto, said turret being removable from said post onunscrewing said clamp, whereby it may be replaced by a like turrethaving a different set of tools.

16. An attachment" for metal-working machines, comprising a verticalnon-rotary center post having a base adapted to be secured upon asuitable support and having its upper end externally threaded, a clampadapted for threaded engagement with said post, a ringlike turretremovably journaled on said post between the base thereof and said clampso as to be clamped against said base by said clamp and having a set ofcutters secured thereto, said turret being removable from said post onunscrewing the clamp, whereby it may be replacedby a like turret havinga different set of tools, and a vertically movable turret lock-mountedon said post and controlled by said clamp for automatically lockingeither turret in indexed positions.

17 An attachment for metal-Working machines, comprising a verticalnon-rotary center post having a base adapted to be secured upon asuitable support and having an externally threaded portion at its upperend, a clamp adapted for threaded engagement With said threaded portionof said post, of a ringlike turret removably journaled on said postbetween the base thereof and said clamp so as to be clamped against saidbase by said clamp and having a set of cutters secured thereto, saidturret being removable from said post, whereby it may be replaced by alike turret having a different set of tools, means on said clamp forindexing each of such turrets When said clamp is rotated to unclamp theturret, a vertically movable lock on said post for automatically lockingeach of such turrets to said base in indexed positions, and means on theclamp for depressing said lock When said clamp is rotated to unclampingposition.

In testimony whereof I have aflixed my signature.

FRED P. LOVEJOY.

